Improvement in stove-pipe dampees



G. TANIKIN.

Stove Pipe Damper.

Patented Sept. 29, 1868.

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.Y @umh .tetes @stent @fitta GEORGE TAMKINQOF NEW-BURG, NEW YGR'K.

Letters Patent No. 82,565, dated September 29, 1868.

IMPROVEMENT IN STOVB-PIPE DAMPERS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, GEORGE TAMKIN, of Newburg, in the county of Orange, and State of New `York, have invented a new and improved Self-Acting Damper; and I do hereby declare that the following is a full, clear, and Aexact description thereof, which will `enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part et' this specification, in which- Figure l is a central vertical section of l"stove-pipe furnished with my improved damper.

Fi'gnreis-an exterior view of the same, showing therpointcr and graduated sector.

Similar letters of reference indicate correspondingparts i ThisV invention consists in the employment of a composite metallic rod within the stove-pipe, in connection with the usual circular damper, and so arranged that the dam-per will be adjusted automatically by the vibration oi' the rod, which vibration is due to the'unequal expansion or dilatation of the two parts composing the rod.-

In the drawings, A isthe pipe or Hum-wherein such interior dempers are usually placed to regulate the degree oflleat to be given out from the l'ire, by being opened or closed, to enlarge orveontract the aperturethrough which the ascending heat passes in obedience to the draught from below.

The damper @is nearly poised on a shaft-rod, a, to which it is ailixed in the usual manner. A few rivets b b, or other equivalent weight, are placed upon one side of the shat`t-rod, so that the damper -will always tip or open in one direction when free to do so.

The composite rod is composed oftwo metals, having different Vexpanding qualities, as iron and copper, or their equivalent, as shown at B and G, the latter being the copper, or its equivalent.

The lower end ot' t-h'e composite rod is riveted or otherwise suitably connected to the sido of the pipe orlue, as shown. i

Tim upper part of the rod is placed in such co-relation to the damper that it will permit the latter to hang vertically when the rod is cold, as shown by the red outlines D B. I

The metalioi` less expanding quality is placed next the weighted half ofthe damper, so that the other metal, of greater expansive character, will, in expanding, curve or bend the rod toward the weighted halt` of thedanlpcr, and raise it, to shut oil` the'draught as the heat increases.

When there is little or noheat in the flue or pipe, the damper will hang vertically, as shown by the red outline D', and the rod beingv then at the red outlincB, but :is-the heat increases, the copper part G ofthe rod diluting more in extent than thei ron part B, the rod will-be curved toward the weighted side of the damper, and the upper end of the rod, which was in easy contact with the under sit-leef the damper, will raise the latter (as the rod is bent by the excessive expansion ofthe copper to the position shown at B G) tothe position shown at D, whereby the draught will be Shut oli' and the heat reduced,

The extreme of the automatic operation of the damper and rod has beendescribed to set forth more clearly the principle of their action, butin actual practice the extreme vclosing of the-damper will not take place, but merely a-partial closing of the same, for as the damper approximates to a horizontal position, the heat-will be lessened in proportionate degree, and the expansion of the copper thereby diminished, the ei'ect of which will be that the variation will be maintained within a small limit, and an equable degree of heat maintained in the stove or tire-box. Y

Av graduated sector, ll, may be aiiixed'to the erterior of the pipe orllue, and a pointerycl, aiiixed to the end of the shaft-rod a. i i

' l'his device will enable the attendant or occupant of the room to note vthe position of the damper at any time, and regulate the fire accordingly, if such regulation be-v of importance.

The rod B G and the graduations in the sector H may lie so constructed and arranged as to indicate pyrometrically tho degree of heat present within the pipe. i

This invention is designed more particularly for stoves and other 'household warmingapparatns, but will be found of service in' regulating the boilers of sugar-'houses or the steam-generators of paper-mills and steamengines, ond the adoption of such a device would conduce to no inconsiderable economization of fuel in these and other like circumstances.

It is simple, cheap, and not likely to become deranged or inoperative I claim as new, and desire to secure -by Letters Patent- The composite rod, composed of the metallic strips B G, of different expansibility, arranged, nith relation to the damper and stove-pipe, as described, whereby the expansion of said rod causes it to move laterally, and thereby to close the damper, as herein shown und described.

The above specification of my invention signed by me, this 10th day of February, 1868.

-GEORGE TAMKIN.

riveted together, and

Witnesses:

WM. F. McNAMARA, ALEX. F. ROBERTS. 

